1) Capable of being stretched 2) Elastic 3) Elasticized 4) Expandable 5) Flexible 6) Having elasticity 7) Like spandex 8) Resilient 9) Stretch 10) Stretchable 11) Supple Found on https://www.crosswordclues.com/clue/stretchy
having a tendency to stretch, esp. excessively or unduly. · capable of being stretched; elastic. · (esp. of a pig) having a long body. Found on https://www.infoplease.com/dictionary/stretchy